@Cr4z33 crap that’s all I have PS there is a new update of buster out now see if that is any better, I’m just upgrading my pi 3B+ From stretch to buster does any one know if it boots from SSD as standard? Oh well guess I’ll find out soon

Can I just upgrade the Pi 3 to the Buster OS so i can just swap the ssd over. Can someone confirm if it’s a plug and play boot from OS on an SSD? Rather than through the bios bit to enable it. Really looking forward to this PI I might get a heat sink but I want a big one not the little ones, need to see if I still have the one from the sky box, got a fan already for it but only activates when the TV is on

No you can’t!
But I guess you know that by now.

Buster on the Pi3B+ and Buster on the Pi 4 need different kernel drivers.
So just switching the card won’t work.
A clean install is the best way at least on the Pi 4.
After all you can try to just move the MM directory to the Pi 4, but honestly I would install the modules and dependencies again as well.

Can I just upgrade the Pi 3 to the Buster OS so i can just swap the ssd over. Can someone confirm if it’s a plug and play boot from OS on an SSD? Rather than through the bios bit to enable it. Really looking forward to this PI I might get a heat sink but I want a big one not the little ones, need to see if I still have the one from the sky box, got a fan already for it but only activates when the TV is on

No you can’t!
But I guess you know that by now.

Buster on the Pi3B+ and Buster on the Pi 4 need different kernel drivers.
So just switching the card won’t work.
A clean install is the best way at least on the Pi 4.
After all you can try to just move the MM directory to the Pi 4, but honestly I would install the modules and dependencies again as well.

Yeah learnt this the hard way , but right now I can’t even use my pi 4 I need boot from usb as that’s how I’m running my 3B+ Also need my heat sinks to come in so I can see what one to use

@dazza120 I’m afraid a heatsink won’t help much but am curious about your results. I haven’t had good results with heatsinks in the past.

Only because you haven’t seen my thermal solution lol, this is one seriously hot chip, had it upto 82 for one reading on the stress test but still at 1.5Ghz on the CPU after that reading it dropped to 80degress this is with just the heat sink no fan. 82degress was during my second stress test and that was just one reading the gap between tests was about 30seconds during both tests no CPU throttling happened. I have put a cable tie around the board and heatsink to keep the pressure on it so it transfers good heat. Not the prettiest but behind a tv well it’s not out of place at all. PS the stress test is 100% cpu usage and no let up during the test had task manager up and CPU usage never fell below